Internal-combustion engine.



C. SAIINDERS,y A. A. RUPPRBCHT & E. L. GRANT.'

INTERNAL GOMBUSTION ENGINE.

APPLICATION FILED JUlEv, 1911.

. immunizedl Dec. 1o, 1912.

nn'irnn scrazrns iearnnii ernten CHARLES s enivnnns, ALWIneLBEnTnnrrnnonr, Ann nDo-Annionsfrnn GRANT, or

. I Lennon, ENGLAND.

rntrnRnaLcoi/rnnsrrion ENGINE.

Specification o Letters Patent.

heisses.,

Application ledlfune 5, 1911. elial No. 631,415.

To all who i imag conce/rn: y

Be it known that we, CHARLES SAUNnnns, ALwiN Ammin' Rorrnncn'r, andEncan Lincns'rnn GRANT, subjects ot the King of the aforesaid centralpartition, forms two combustion chambers, and it is provided near cachend with exhaust ports adapted to be uncovered and covered during therecip` Patented Dec. it), gt.'

England, residing at London, England, l'ocatory vmm'enients ot thesleeve, and in 60 have invented` certain new and useful lmsuch sequence,that the inlet of compressed provements in Internallombustion En-ycharge to each combustion chamber begins gines; and we do hereby declarethe tollowwhile the corresponding exhaust ports are ing to-be a full,clear, and exactdescription openl whereby thorough scavenging isasof theinvention, such as will enable others sured. 65 skilled in the art towhich it appertains to Ignition of the charge compressed in each makeand use the same, reference being had combustion chamber is effected atthe corto the accompanying drawings, and to le'trect time by suitablemeans, but in the preters or figures of reference marked thereon, feiredform of the invention sparking plugs l5 which form a part of thisspecification. are arranged in suitable positions and are 70 rllhisinvention relates to improvements in adapted to be placed alternately'in firing two-stroke cycle internal combustion onconnection with therespctaive combustion gines and more especially to double actingchambers by means of ports in .the aforesaid 'internal combustionengines of the typ@ in partition as the sleeve approaches the end whicha sleeve having a central partition is Oi euch Stlolc- 75 adapted toreciprocate over two stationary 'lhe lzmzompallying.drawings.illustrateby pistons arranged one each end. ot a sta- .way ot example one :tornioi eugineacco-rdtionary cylinder' and in spaced relation ingle theinvention, Figures l, and 2, being thereto so as to leave annular spacesto similar trout sectional elevations illustratreceive the endg `0f theSain Sleeve, ing the sleeve at dili'erent positions of the 80 @ne objectof the present invention to crank. Fig. 3, a side elevation halt -indevise an engine of the above type capable Scctlon. A l

of transmitting an impulse every stroke, ln the forinoi the inventionillustrated .a and having means whereby the combustible Sleeve a,Cllvuledbyn` central partition, l),

charge can be subjected to a preliminary icclprocates within astationary cylinder' c, 85 con'ipression before entering and beingsubhaving a stationary pistoird, arranged lat ject-,ed to a SecondaryComlircssion in each cach end and in spaced relation thereto so asColnbugtion" Chai/Ubel", (and 51,150 whereby the t() lQZl'VG lllnlllliSplQCS tt) l'QCClVG ill@ tl'lfl u entry of the charge to each ol saidchambers llOItOl'lS Oi" thtv sleeve a. Two combustion is @1l-gend at@ngen-d lng-@03%, while in@ 0X. chambers c, are thereby loru'ied withinthe 90 haust gases are escaping at the opposite end, to insure thoroughscavenging, said coin trolling means being ot such torni as to (lispenseith the necessity for puppet and like valves.

[recording to the present invention the central portion oli the enginecylinder enlarged so to form in conjunction with 'the sleeve an annularchamber which 4is utilized sleeve and between the stationary pistonsc7., and the partition t y The central portion ot the engine cylinder c,is enlarged so as to torni in conjunction with the sleeve a, an annularconign'essor 9 chamber g, the partition o, being enlarged to torni acompressor piston y11., to work in said chamber gf, and i'o antlieiewi-lh a double acting compre lor. The sleeve e, connectl 3S L@Glnprngsor chamber, the partition ot' ed to any suitable mechanism fortransinit- 100 the sleeve being enlarged to it'ori a piston ting itsmotiont'or instance it is connected for lworking therein, so that adouble acting to a crank i, by means of a coi'ineeting rod f, compressoris thereby inovided, the suction having the usual forni ot' gudgeon pinZ, the and delivery ports of which are adapted to li'ivfer stationarypiston c?, having slots m, to

5@ ie controlled by the compressor piston, so permit of the treercciprocation olI the pin Z. 105

that the combustion chambers before each Carburetetl air or othersuitable comceinpression stroke are alternately supplied bustible iiuidis drawn into the compressor by the compressor with coi'npressed charge.chamber t, through section ports n, snrihe; aforesaid reciprocatorysleeve, in rounded by an annular inlet chamber u, and

conjunction wh the stationary pistons and after being subjected to aprelin'iinary 'com- 110 pression in the per exhaust ports 1".

chamber g, by the piston h, is allowed to enter the combustion chamberse,l o way of ports-gain the partition b, when 4 sai ports are broughtinto register with p'orts g. The sleeve a, is provided with a set ofexhaust ports a", near each end, adapted to be brought periodically intoregister with annular exhaust passages s, leading to'the.

atmosphere by ports t.

Ignition of the charges compressed inthe combustion chambers is effectedby sparking plugs l,adapted to be alternately brought into 4sparkingconnection with .their respecr tive chambers by the ports p, inthepartition b, when the latter approaches vthe end of each ',stroke. fy i The cycle of operations is as follows to be in the positionindicated in 1, a compressed charge in the lower combustionchamber e,'is .just ,about to be ignited by the respective sparking plug fu, thecorresponding ort p, placing it 1n connection with saidA com ustionchambei'. In the meantime the compressor piston h, will have created apartial vacuum in the upper part of the compressor chamber g, and alsouncovered the inlet ports n', so that a fresh supply of carbureted airwill enter the said upper Apartei the chambeing. Simultaneously` withthis action the charge previously piston h, in the lower part of thecompressor chamber g, will pass through the respective ports vgl, and p,into the upper combustion chamber c, and the previously exploded chargetherein will exhaust'through the up- Upon combustion occurring in thelower chamber e, the sleeve a, vwill move upwardly, the various ports p,n, and 1', being closed as indicated in Fig. 2, so-

that 4the charges in the upper part of the chamber g, and upper chambere are subjected toa preliminary and secondary comas'described abovewithreference-to Fig. 1,`

pression respectively. When the sleeve a, approaches the cndof-itsupward Vstroke the same conditions obtain at the upper end in respect-of'the lower endof the stroke,

that-is to say the charge compressed in the ,upper combustion chamber e,will be ignited by the upper sparking plug fu, which will be placed inconnection with the said chamber enter by the respective port while theburnt gases in the lower cham er e,':will begin to escape through thelower. exhaust ports r',

andv the fresh charge compressed in the up-v per partof thecompressorchamber g, will x the lower combustionA chamber e, throughIthe upper Iport g, and' respective port p. At the same timeja freshsupply of combustible fluid will enter the lower part Vofthe compressorchamber g, through-.the

ports n., The sleevevwill then move downwardly, the various ports a, p,and r, being then closed, as will beunderstood on refercompressed by thecompressor compressor that an impulse is obtained for every stroke ofthe sleeve a, or two impulses for every revolution of the crank.Efficient scavenging'of the combustion chambers ,is insured, as thepreliminary compressed charge enters each; chamber at the end remote`from the exhaust ports. As the compressor is doubleacting an adequateinduction and compression of fresh combustible fluid are effectedJ andan adequatelsupply of compressed fluid isfprovided for each combustionchamber.

These radvantages are obtained by the use, 'within theengine proper ofonly one mov` ing'part, lnamely the sleeve a, irrespective lence toFig.2. y It will thus be understood of the' connecting`- rod and like partsfor4 itransmitting the motion of the sleeve, no

puppet valves orthe like moving parts'beingv i necessary. .f

- Weclaimz-v 1.' lIn a combustion engine'ofthe'character described, thecombination of a cylinder -providedwith an enlarged portion to form a"-compression .chamber and a .gasreceiving chamber, the latter havingopenings which .communicate with the compression chamber,

said-cylinder having an exhaust port, a pis? ton .supported in the en-dofthecylinder and spaced from the 'walls thereof, a sleeve having apartition and a iange, .tle latter" operating in 'the compressionlchamber,v sleeve operating in the cylinder-.and vover the 'piston' andforming with the 4latter a combustion chamber, said sleeve having anexhaust port near its open end, the partition having-a port located toadmita charge to the combustion chamber from 4the compres-l sion chamberafter the flange has compressed said-charge in' said compression chamberand when'the exhaust port in the sleeve communicates with the exhaustportin the cylinder, andmeans for ignitingthe charge in the combustionchamber through the port inthe partition.'

2. In a double-acting internal combustion i'iol engine, a cylinderhaving astationary .piston at eachA end in spaced'relationtothecylindrical surface thereof,a reciprocatory sleeve 4 havinga'centia-l partition,` said, sleeve being disposed on-'said pistons so'as to forni therewith two combustion chambers, an annular doublelacting Vcompressor chamber sur-- roundiiigsaid sleeve andl havinga com-.presser piston which is carried by said leeve, andmeans for alternatelyconnecting the compressor substantially as and for the purpose here-'inbeforeset-forth '3. Ina doubleacting iiiternalcombiistion engine, acylinder having a stationary pisto`n at each en-d in spaced relation tothe sleeve having 'ay f central K partition, sai

'12o 'chamber on each side 'of the 4 .piston with`- the combustion jchamber which is -re'mote fromsaid side,.

Steeve being disposed on said pistons so as to form therew'th twocombustion chambers, an annular double acting; compressor chainbersurrounding said sleeve and having a compressor piston which is carriedby said sleeve, means for alternately connecting the compressor chamberon each side of the compressor piston vwith the coml'iustion chamberwhich is remote from said side said connection being effected at one endof said combustion chamber, and means for conductingl away the burnt.opposite end of said chamber simultaneously with said connection being;retlccted, substati- .15 tially as and for the purpose hereinbefore setl`forth.

4. In a double acting internal coi'nbustiou engine comprising a cylinderhaving a stationary piston at each end in spaced relation to thecylindrical surface of said cylinder, and a sleeve adapted toreciprocate on said pistons, said sleeve having; a central partition,the combination of a central double actingcompressor sleeve and acompressor piston therefor on said sleeve., the emnprcssor chamberhaving suction and two delivery ports,controlled by the compressorpiston, and the sleeve having` inlet ports ou opposite, sides of thepartition adapted to register alternately with the de-- livery ports ofthe compressorchaml'ieig the sleeve. also having exhaust ports near itsends, adapted to be uncovered by the reciprocation of the sleevesimultaneously with the registration of the aforesaid ports,substantially as and .for the purpose hereinbcfore set forth.

5. A double acting' tivo stroke cycle internal combustion enginecon'iprising in com- 40 bination, a cylinder having a statiomiry pistonat each end in spaced relation to the cylindrical surface thereof, areeiproeatory sleeve disposed on said pistons and having a central.partition dividing: it into two combastion chambers, a double act-ingicompres- `sor surrounding said sleeve and provided with delivery portsand having a compressor piston on the sleeve, and two sparking plugs onthe walls of the compressor the partition of the sleeve having two portsconununieating with the aforesaid combustion chambers, and adapted onreciprocation of the sleeve to be brought alternately into register withthe respective delivery ports of the etnupressor and with the aforesaidsparking plugs,

substantially as and for the purpose hereinbefore set forth.

G. In a double acting internal combustion engine, a cylinder having astationary piston at each end in spaced relation to the gases from theehan'iher surrounding said' l ,I l

l l l i l t l l l i cylindrical surface thereof, a sleeve adapted toreciprocate on said pistons and havingr a central partition, an annulardoable acting compressor chamber surrounding` the central part of saidsleeve, a compressor piston on the sleeve adapted to reciprocate in saidchamber, a gudgeon pin in the lower end of said sleeve, a crank shaft,and a rod connecting said gudgeon pin and the era-nk of said shaft, thestationary piston at the adjacent end of the cylinder being,- slotted topermit of the reeiprocation of the gudgeon pin, substantially as and forthe purpose hereinbefore set forth.

7. ln combination with 'the cylinder of an internal combustion engine, astationary piston at each end of said cylinder and in spaced relation tothe cylindrical surface thereof, a sleeve slidable on said stationarypistons, a eonipressoi.' chamber having delivery ports at the endsthereof, a ported division wall in said sleeve and forming` separatecomliiustion chai'nbers on each side thereof, said ports leadinoj vfromopposite sides of said division wall to communicate only at and near theend of each Worl'iing stroke with (ine of the delivery ports from saidcompressor chamber. said cylinder having eX- haust; passages which areuncovered by the sleeve at the time the ports in the division walleonnnunieate with the delivery ports l from the compressor.

8. in a two stroke cycle internal coml'uis- `tion engine, thecombination of a working cylinder ha ving a compression chamber 'formedwith inlet ports, stationary pistons fixed on the ends thereof .inspaced relation to the cylinder, the worltiufrA cylinder having:exhaust. passages, a sleeve having a partition said sleeve operatingover the pistons and adapted at. the outer end' of each stroke toVuncover oney of the exhaust passages, a compressor onthe sleeve, saidcon'ipressor operating in the uncovering the ports therein when one ofthe exhaust ports unfaivered, the partition havingr inlet passages foradmitting` a coinpressed charge upon each complete reciproeation of thesleeve and at a time. when the inlet ports are uncovered.

In testimony whereof we have signed our naines to thisI specitiration inthe presence of two subsmibing,r witnesses.

Il. I?. Jamison.

cou'lpression chamber and

